21454750 has 16 divisors (see below), whose sum is σ = 40163760. Its totient is φ = 8581800.

The previous prime is 21454747. The next prime is 21454777. The reversal of 21454750 is 5745412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42660 + ... + 43159.

It is an arithmetic number, because the mean of its divisors is an integer number (2510235).

Almost surely, 2^21454750 is an apocalyptic number.

21454750 is a deficient number, since it is larger than the sum of its proper divisors (18709010).

21454750 is an equidigital number, since it uses as much as digits as its factorization.

21454750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85836 (or 85826 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 21454750 is about 4631.9272446790. The cubic root of 21454750 is about 277.8696747796.

The spelling of 21454750 in words is "twenty-one million, four hundred fifty-four thousand, seven hundred fifty".